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Employee Retirement Plans - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Defined Benefit Plan Disclosure [Line Items]
Number of defined contribution 401K savings plans	2
Elgin Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to the pension plan	.3
Smithville Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to the pension plan	.6
Wrexham Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to the pension plan	.5
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer to 401K savings plan	$ 0.1	$ 0.1	$ 0.1

Descriptive information regarding the employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions. Description may include a range of expected contributions, required minimum contribution, whether the expected contribution is discretionary, and further explanation.

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